orbit morphology trait zygomatic bone morphology trait Trait.ontology jugal bone morphology trait Any measurable or observable characteristic related to the shape, structure, color or pattern of the quadrilateral bone that forms the prominence of the cheek, the lateral wall and margin of the orbit, and the anterior two thirds of the zygomatic arch. EFO:0007847 yoke bone morphology trait malar bone morphology trait VT:0005270 cheek bone morphology trait viscerocranium morphology trait